I'm not sure how the quality can be judged from pictures in reviews. I don't believe they were aiming for 19th century British India but more like a western club decorated with exotic art work.
In any event, I've only been in a handful of signature restaurants, and other than King Stefan's (if that counts), none of them have notable decor. HBD has a very pleasant airiness, and might convey aspects of the original, but unless you're familiar with the original and it's a superb job, I don't see anything enticing about it. I don't remember anything about Artist's Point, other than being unimpressed, suggesting there's nothing about it worth remembering. California Grille is dominated by the view, but it's not much value if you're not sitting near the window. The lounge (or maybe it was the sushi bar) struck me as more exciting decor.
And that's as it should be. When you're paying those prices, the focus should be on the food, particularly in the park. Few restaurants can do both. San Angel Inn has potential, but they'd have to up the menu and scale back the number of tables, something that's probably impossible for Mexican cuisine at WDW. Blue Bayou at DLR is the only Disney restaurant I can think of that pulls off the combination of atmosphere and quality, or at least it did when I was there ten years ago.
) If anyone like off the beaten path beer, try their 
